Improvement in clay-pipe dies



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UNITED STATES PATENT OFFICE.

GEORGE D. GOODRIOH AND HORACE A. GOODRIOH, OF JOLlET, ILLNOIS.

IMPROVEMENT IN CLAY-PIPE DIES.

Specification forming part of Letters Patent No. 58,851, dated October 1G, 1866.

To all fwhom it may concern:

Be it known that we, G. D. GOODRIOH and H. A. GooDRIcH, of the town ot' Joliet, in the county of Will and State of illinois, have invented new and useful Improvements in the Dies of the Machines Vorking and Manufacturing Clay or any other suitable Material into Pipes 5 and we do hereby declare that the following is afull and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l represents a vertical section of the die, and Fig. 2 the'front view of the same.

The nature of our invention consists in the die, the core. of which is detached from the feeding-shaft of the clay-pipe machine, and is placed 011 its own stationary shaft in such a manner as to revolve with and by the motion of the clay, as this comes from the temperin g-mill, thereby preventing injury and breaking of the pipe, as would be the case with the machines having stationary cores.

It consists, also, in an improved face-plate of the die, the funnel-shaped portion of which enters the" tempering-mill, and its interior surface making a perfect inclined plane with the tapering interior surface of the mill.

To enable others skilled in the art to make and use our invention, we will describe its construction and operation.

In our improved die the core consists of a cone, Fig. l, cut at a point, a', transversely and parallely to its base, in two parts, the upper part, A, of which, being solid, is iirmly set on the immovable bar or bridge B, and having a shaft, l, protruding downward, while the lower portion, D, of the cone, which may be called core proper, is hollow, and by means of' its hub E is set on the shaft O, and is permitted to revolve on it.

With these arrangements the core,

being capable of revolving with and by the motion of the clay as it approaches and passes the orifice of the die under the pressure of thc tempering-mill, prevents injury andbreaking of the/pipe, which would occur should the core be stationary, while at the same time the bridge B retards the revolution of the clay; and hence the revolution of the pipe, as it comes out of the die-a matter of importance in the manufacture of pipes, and an operation which is not performed in a machine in which the core is connected with or forms a part of the feeding-shaft; besides that, theconical shape of the corelesscns its resistance to the clay.

rEhe face-plate F of our die has a funnelshaped ring, Gr, cast upon and forming part of the same, which, when the face-plate is put on, enters the mill and makes, with another detached and stationary funnel, H, a perfect inclined plane. Said funnel H, making a sep arate part ofthe face-plate, has its interior surface shaped in such a manner as to form a perfect continuity with the inclined plane of the interior surface of 'the mill when putinside.

For different sizes of the pipes different face plates have to be used, but in each of them the funnel-shaped ring G is so constructed that its interior surface makes, in every case, one continuous inclined plane with the surface of the funnel H.

The advantages of this face-plate consist in its lightness, adaptation for pipes of various sizes, and exemption from the pressure of clay upon it; and hence an exemption from that tendency, which the pressure of the clay always shows, to displace the funnel out of its true position.

The above description of the parts of our dies shows conclusively that, its core being disconnected from the workin g-shaft preserves always its center in proper and true position, while in other machines the position of the center of the core, depending from the position of the shaft, is liable to be changed by the pressure ofthe clay or some other causes.

Having thus described our invention, we state that we do not claim the invention of a conical core or a stationary bridge, nor a loose or revolving core on a revolving shaft; but

W'hat we do claim, and desire to secure by Letters Patent, is

The improvement, iu the machines, of any strneted and operating substantially as herein construction, used for the manufacture rof described and speeied. pipes by which a rotary or spiral motion is given to the clay or other suitable material in the process of manufacture, consisting in the die with its revolving eore det-ached from lditiiesses: the feeding-shaft and placed upon a station- W. W. STEVENS, arysbaft, and its funnel-shapedface-plate,eou- E. H. SPINNING. 

